多项选择题
A. The command restores only the missing control file.
B. The command restores all the control files.
C. The command fails because the database is running.
D. This is the correct way to address this problem.
E. This is not the correct way to address this problem.
单项选择题 Which of the following advisors within the Oracle advisory framework will analyze a single SQL statement and make recommendations for performance improvement?（）
单项选择题 Which of the following advisors within the Oracle advisory framework will analyze a single SQL statement and make recommendations for performance improvement?（）
单项选择题 What is the correct order of the following commands if you wanted to restore datafile 4， which was accidentally removed from the file system？（） a. sql ’alter database datafile 4 online’ b. restore datafile 4 c. recover datafile 4 d. sql ’alter database datafile 4 offline’ e. startup f. shutdown